Image display scanning circuit with outputs from sequentially switched pulse signals
First Claim
1. A scanning circuit comprising:
- m lines of pulse signal lines for use in inputting signals;
l lines of output signal lines for use in outputting signals; and
switching means for sequentially switching signals to be output to said output signal lines between ON and OFF according to signals input to said pulse signal lines,wherein said switching means switches signals to be output to said output signal lines between ON and OFF by a logic operation based on n signals input to n input lines of said switching means, said n signals being taken from selected combinations of the m lines of said pulse signal lines, each combination of the n lines used in a logic operation produces an output signal on a different one of said output signals lines, n satisfying a condition of mCn≧
l where n, m and l are positive integers, and wherein a plurality of output signal lines are not turned ON simultaneously.
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Accused Products
Abstract
An active-matrix image display device which includes n shift registers, analog switches for sampling video input signals and a data-signal-line driving circuit to which n series of clock signals and n×m series of video input signals are input, and controls the analog switches according to the result of a logic operation of output pulses from successive l stages in the shift registers. A scanning circuit without using shift registers. Here, n is an integer not smaller than one, m and l are integers not smaller than two. With the image display device, sampling of video signals is surely executed without increasing the number of shift registers. It is thus possible to reduce the size and weight of the image display device and to decrease the defect rate thereof. Moreover, the scanning circuit achieves a higher yield compared with a conventional scanning circuit using a shift register.
74 Citations
10 Claims
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1. A scanning circuit comprising:
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m lines of pulse signal lines for use in inputting signals; l lines of output signal lines for use in outputting signals; and switching means for sequentially switching signals to be output to said output signal lines between ON and OFF according to signals input to said pulse signal lines, wherein said switching means switches signals to be output to said output signal lines between ON and OFF by a logic operation based on n signals input to n input lines of said switching means, said n signals being taken from selected combinations of the m lines of said pulse signal lines, each combination of the n lines used in a logic operation produces an output signal on a different one of said output signals lines, n satisfying a condition of mCn≧
l where n, m and l are positive integers, and wherein a plurality of output signal lines are not turned ON simultaneously. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification